“Ecomotors - I want a pollution-free engine”. – During the World War II, for some American aircrafts they used the engines with cylinders that, along with fuel, were injected a minor portion of water. Coming in contact with burning fuel and white-hot surfaces of the piston and the cylinder, the water boiled, and the expanding steam helped the actuation gases to jog the piston and do the useful work. The water, transforming into the steam when boiling or evaporating, expanded in volume by 1700 times (under atmospheric pressure), which considerably increased the power, torque and efficiency factor of the engines. It provided not only for fuel economy and increase of power for 10-15%, but also for facilitation of the cooling system because the cylinders were cooled with water rather internally than externally. Because of their complexity, the engines with water-injection into the cylinders were not used on a large scale. The contemporary science and technology, especially electronics, achieved impressive progress, and now that the oil prices are constantly increasing, it’s high time to return to these undeservingly forgotten, but very potential engines. The electronics should control the precise dose of the injected water and its pre-warming from external walls of the cylinder in order to make the water’s temperature, before the injection, as much as possible approach the steam point which inevitably rises in the compressed gas medium. The electronics also can control the warming up of the fuel and air entering the cylinders. The more effective direct water-cooling of the scorching, intensively rubbing piston rings, the piston and the cylinder, extends the operations of the engine. Injected water and steam make it possible to create the required form and speed of the flame expansion, and thus, to prevent the explosive effects (detonation) and, without any harm for the engines, to increase the pressure of the fuel mixture and use the cheaper low-octane gasoline. The water injected into the cylinder will low down the temperature of the burning gases and thus constraint the http://vasilijbezukladnikov.narod.ru

from wiki: According to the United States Environmental Protection Agency, the 2008 Prius is the most fuel efficient car sold in the U.S.[2] The UK Department for Transport also reported the Prius is tied as the third least CO2-emitting vehicle on sale in the UK.[3]